body {
    margin: 0;
    font-family: Arial;
    background: #e3e3e3;
}

nav {
    background: lightskyblue;
    padding: 20px 40px;
    box-shadow: 0 0 10px rgba(0, 0, 0, .4);
}

nav ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

nav ul li {
    padding: 0;
    margin: 0;
}

nav ul li a {
    display: block;
    padding: 4px 20px;
    color: black;
    text-decoration: none;
}
nav ul li a:hover {
    color: white;
}

.content {
    width: 960px;
    margin: 0 auto;
    padding: 40px 100px;
}